Users are often puzzled why there are short recordings. Previously
the only way to see this was to examine Moonfire's logs. This should
be a much better experience to find it right in the UI where you're
wondering, and without the potential the logs are gone.
Fixes#302
This requires a bunch of package name changes. See
[https://mui.com/blog/material-ui-is-now-mui/] for their rationale.
[https://mui.com/guides/migration-v4/] lists the changes:
```
@material-ui/core -> @mui/material
@material-ui/system -> @mui/system
@material-ui/unstyled -> @mui/core
@material-ui/styles -> @mui/styles
@material-ui/icons -> @mui/icons-material
@material-ui/lab -> @mui/lab
@material-ui/types -> @mui/types
@material-ui/styled-engine -> @mui/styled-engine
@material-ui/styled-engine-sc ->@mui/styled-engine-sc
@material-ui/private-theming -> @mui/private-theming
@material-ui/codemod -> @mui/codemod
@material-ui/docs -> @mui/docs
@material-ui/envinfo -> @mui/envinfo
```
We only use a few of these.
As written in the changelog: Live streams formerly worked around a
Firefox pixel aspect ratio bug by forcing all videos to 16:9, which
dramatically distorted 9:16 camera views. Playback didn't, so anamorphic
videos looked correct on Chrome but slightly stretched on Firefox. Now
both live streams and playback are fully correct on all browsers.
